Polyolefin polymerization process, process of producing catalyst, and catalyst
AssigneePhillips Petroleum Company
InventorJoel L. Martin
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Abstract
A process for preparing a polymerization catalyst useful for the polymerization of olefins is provided comprising contacting a magnesium compound and a transition metal halide to form a solid product; contacting the solid product with an organoaluminum halide to form a first catalyst component, and contacting the first catalyst component with an activating agent to form a catalyst. Other aspects of the invention provide a catalyst prepared by the above described method and a polymerization process employing the thus prepared catalyst.
Claims10
A process for preparing a polymerization catalyst comprising
- (1) contacting a magnesium compound, a 4-phenylphenol, and titanium tetrachloride to form a solid product,
- wherein said magnesium compound is a dialkylmagnesium compound wherein each alkyl group contains 1 to 12 carbon atoms;
- (2) contacting said solid product and an organoaluminum halide to form a first catalyst component,
- wherein said organoaluminum halide contains at least one hydrocarbyl radical selected from hydrocarbyl radicals containing 1 to 12 carbon atoms per radical;
- and
- (3) contacting said first catalyst component and an activating agent to form said catalyst,
- wherein said activating agent is titanium tetrachloride, silicon tetrachloride, C.sub.6 H.sub.5 SiCl.sub.3, or mixtures thereof.
A process for preparing a polymerization catalyst comprising:
- (1) contacting dibutylmagnesium, a 4-phenylphenol, and then titanium tetrachloride to form a solid product;
- (2) contacting said solid product and ethylaluminum sesquichloride to form a first catalyst component;
- and
- (3) contacting said first catalyst component and an activating agent to form said catalyst,
- wherein said activating agent is titanium tetrachloride, silicon tetrachloride, C.sub.6 H.sub.5 SiCl.sub.3, or mixtures thereof.
Dependencies are inferred from the claim text.